Mohammed, Ryan Simon, Cock van Oosterhout, Bettina Schelkle, Joanne Cable, and Mark McMullan. 2012. “Upstream Guppies (Poecilia Reticulata, Peters, 1859) Go Against the Flow”. Biota Neotropica 12 (3). Sao Paulo, Brazil. //www.biotaneotropica.org.br/BN/article/view/1014.